28348979 has 8 divisors (see below), whose sum is σ = 31052160. Its totient is φ = 25760896.

The previous prime is 28348967. The next prime is 28348987. The reversal of 28348979 is 97984382.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28348979 - 2⁴ = 28348963 is a prime.

It is a super-2 number, since 2×28348979² = 1607329220684882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28348909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28259 + ... + 29244.

It is an arithmetic number, because the mean of its divisors is an integer number (3881520).

Almost surely, 2^28348979 is an apocalyptic number.

28348979 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28348979 is a deficient number, since it is larger than the sum of its proper divisors (2703181).

28348979 is a wasteful number, since it uses less digits than its factorization.

28348979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57549.

The product of its digits is 870912, while the sum is 50.

The square root of 28348979 is about 5324.3759258715. The cubic root of 28348979 is about 304.9152465396.

The spelling of 28348979 in words is "twenty-eight million, three hundred forty-eight thousand, nine hundred seventy-nine".